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Airforming constructive system
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Patent number 12,005,607
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Issue date Jun 11, 2024
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Applied Physics, Inc.
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Gianni Martire
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B28 - WORKING CEMENT, CLAY, OR STONE
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Method for making a concrete block
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Patent number 4,393,018
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Issue date Jul 12, 1983
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Burrell Construction & Supply Co.
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William L. Harbaugh
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B28 - WORKING CEMENT, CLAY, OR STONE
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3689614
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Patent number 3,689,614
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Issue date Sep 5, 1972
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B28 - WORKING CEMENT, CLAY, OR STONE
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2677955
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Patent number 2,677,955
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Issue date May 11, 1954
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B28 - WORKING CEMENT, CLAY, OR STONE
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2637890
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Patent number 2,637,890
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Issue date May 12, 1953
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B28 - WORKING CEMENT, CLAY, OR STONE
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1624386
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Patent number 1,624,386
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Issue date Apr 12, 1927
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B28 - WORKING CEMENT, CLAY, OR STONE